hw/mips_malta.c

   1 /*
   2  * QEMU Malta board support
   3  *
   4  * Copyright (c) 2006 Aurelien Jarno
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24
  25 #include "hw.h"
  26 #include "pc.h"
  27 #include "fdc.h"
  28 #include "net.h"
  29 #include "boards.h"
  30 #include "smbus.h"
  31 #include "block.h"
  32 #include "flash.h"
  33 #include "mips.h"
  34 #include "pci.h"
  35 #include "qemu-char.h"
  36 #include "sysemu.h"
  37 #include "audio/audio.h"
  38 #include "boards.h"
  39 #include "qemu-log.h"
  40 #include "mips-bios.h"
  41
  42 //#define DEBUG_BOARD_INIT
  43
  44 #ifdef TARGET_MIPS64
  45 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffULL)
  46 #else
  47 #define PHYS_TO_VIRT(x) ((x) | ~0x7fffffffU)
  48 #endif
  49
  50 #define ENVP_ADDR (int32_t)0x80002000
  51 #define VIRT_TO_PHYS_ADDEND (-((int64_t)(int32_t)0x80000000))
  52
  53 #define ENVP_NB_ENTRIES         16
  54 #define ENVP_ENTRY_SIZE         256
  55
  56 #define MAX_IDE_BUS 2
  57
  58 typedef struct {
  59     uint32_t leds;
  60     uint32_t brk;
  61     uint32_t gpout;
  62     uint32_t i2cin;
  63     uint32_t i2coe;
  64     uint32_t i2cout;
  65     uint32_t i2csel;
  66     CharDriverState *display;
  67     char display_text[9];
  68     SerialState *uart;
  69 } MaltaFPGAState;
  70
  71 static PITState *pit;
  72
  73 static struct _loaderparams {
  74     int ram_size;
  75     const char *kernel_filename;
  76     const char *kernel_cmdline;
  77     const char *initrd_filename;
  78 } loaderparams;
  79
  80 /* Malta FPGA */
  81 static void malta_fpga_update_display(void *opaque)
  82 {
  83     char leds_text[9];
  84     int i;
  85     MaltaFPGAState *s = opaque;
  86
  87     for (i = 7 ; i >= 0 ; i--) {
  88         if (s->leds & (1 << i))
  89             leds_text[i] = '#';
  90         else
  91             leds_text[i] = ' ';
  92     }
  93     leds_text[8] = '\0';
  94
  95     qemu_chr_printf(s->display, "\e[H\n\n|\e[32m%-8.8s\e[00m|\r\n", leds_text);
  96     qemu_chr_printf(s->display, "\n\n\n\n|\e[31m%-8.8s\e[00m|", s->display_text);
  97 }
  98
  99 /*
 100  * EEPROM 24C01 / 24C02 emulation.
 101  *
 102  * Emulation for serial EEPROMs:
 103  * 24C01 - 1024 bit (128 x 8)
 104  * 24C02 - 2048 bit (256 x 8)
 105  *
 106  * Typical device names include Microchip 24C02SC or SGS Thomson ST24C02.
 107  */
 108
 109 //~ #define DEBUG
 110
 111 #if defined(DEBUG)
 112 #  define logout(fmt, ...) fprintf(stderr, "MALTA\t%-24s" fmt, __func__, ## __VA_ARGS__)
 113 #else
 114 #  define logout(fmt, ...) ((void)0)
 115 #endif
 116
 117 struct _eeprom24c0x_t {
 118   uint8_t tick;
 119   uint8_t address;
 120   uint8_t command;
 121   uint8_t ack;
 122   uint8_t scl;
 123   uint8_t sda;
 124   uint8_t data;
 125   //~ uint16_t size;
 126   uint8_t contents[256];
 127 };
 128
 129 typedef struct _eeprom24c0x_t eeprom24c0x_t;
 130
 131 static eeprom24c0x_t eeprom = {
 132     contents: {
 133         /* 00000000: */ 0x80,0x08,0x04,0x0D,0x0A,0x01,0x40,0x00,
 134         /* 00000008: */ 0x01,0x75,0x54,0x00,0x82,0x08,0x00,0x01,
 135         /* 00000010: */ 0x8F,0x04,0x02,0x01,0x01,0x00,0x0E,0x00,
 136         /* 00000018: */ 0x00,0x00,0x00,0x14,0x0F,0x14,0x2D,0x40,
 137         /* 00000020: */ 0x15,0x08,0x15,0x08,0x00,0x00,0x00,0x00,
 138         /* 00000028: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 139         /* 00000030: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 140         /* 00000038: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x12,0xD0,
 141         /* 00000040: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 142         /* 00000048: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 143         /* 00000050: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 144         /* 00000058: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 145         /* 00000060: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 146         /* 00000068: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 147         /* 00000070: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 148         /* 00000078: */ 0x00,0x00,0x00,0x00,0x00,0x00,0x64,0xF4,
 149     },
 150 };
 151
 152 static uint8_t eeprom24c0x_read(void)
 153 {
 154     logout("%u: scl = %u, sda = %u, data = 0x%02x\n",
 155         eeprom.tick, eeprom.scl, eeprom.sda, eeprom.data);
 156     return eeprom.sda;
 157 }
 158
 159 static void eeprom24c0x_write(int scl, int sda)
 160 {
 161     if (eeprom.scl && scl && (eeprom.sda != sda)) {
 162         logout("%u: scl = %u->%u, sda = %u->%u i2c %s\n",
 163                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda, sda ? "stop" : "start");
 164         if (!sda) {
 165             eeprom.tick = 1;
 166             eeprom.command = 0;
 167         }
 168     } else if (eeprom.tick == 0 && !eeprom.ack) {
 169         /* Waiting for start. */
 170         logout("%u: scl = %u->%u, sda = %u->%u wait for i2c start\n",
 171                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 172     } else if (!eeprom.scl && scl) {
 173         logout("%u: scl = %u->%u, sda = %u->%u trigger bit\n",
 174                 eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 175         if (eeprom.ack) {
 176             logout("\ti2c ack bit = 0\n");
 177             sda = 0;
 178             eeprom.ack = 0;
 179         } else if (eeprom.sda == sda) {
 180             uint8_t bit = (sda != 0);
 181             logout("\ti2c bit = %d\n", bit);
 182             if (eeprom.tick < 9) {
 183                 eeprom.command <<= 1;
 184                 eeprom.command += bit;
 185                 eeprom.tick++;
 186                 if (eeprom.tick == 9) {
 187                     logout("\tcommand 0x%04x, %s\n", eeprom.command, bit ? "read" : "write");
 188                     eeprom.ack = 1;
 189                 }
 190             } else if (eeprom.tick < 17) {
 191                 if (eeprom.command & 1) {
 192                     sda = ((eeprom.data & 0x80) != 0);
 193                 }
 194                 eeprom.address <<= 1;
 195                 eeprom.address += bit;
 196                 eeprom.tick++;
 197                 eeprom.data <<= 1;
 198                 if (eeprom.tick == 17) {
 199                     eeprom.data = eeprom.contents[eeprom.address];
 200                     logout("\taddress 0x%04x, data 0x%02x\n", eeprom.address, eeprom.data);
 201                     eeprom.ack = 1;
 202                     eeprom.tick = 0;
 203                 }
 204             } else if (eeprom.tick >= 17) {
 205                 sda = 0;
 206             }
 207         } else {
 208             logout("\tsda changed with raising scl\n");
 209         }
 210     } else {
 211         logout("%u: scl = %u->%u, sda = %u->%u\n", eeprom.tick, eeprom.scl, scl, eeprom.sda, sda);
 212     }
 213     eeprom.scl = scl;
 214     eeprom.sda = sda;
 215 }
 216
 217 static uint32_t malta_fpga_readl(void *opaque, target_phys_addr_t addr)
 218 {
 219     MaltaFPGAState *s = opaque;
 220     uint32_t val = 0;
 221     uint32_t saddr;
 222
 223     saddr = (addr & 0xfffff);
 224
 225     switch (saddr) {
 226
 227     /* SWITCH Register */
 228     case 0x00200:
 229         val = 0x00000000;               /* All switches closed */
 230         break;
 231
 232     /* STATUS Register */
 233     case 0x00208:
 234 #ifdef TARGET_WORDS_BIGENDIAN
 235         val = 0x00000012;
 236 #else
 237         val = 0x00000010;
 238 #endif
 239         break;
 240
 241     /* JMPRS Register */
 242     case 0x00210:
 243         val = 0x00;
 244         break;
 245
 246     /* LEDBAR Register */
 247     case 0x00408:
 248         val = s->leds;
 249         break;
 250
 251     /* BRKRES Register */
 252     case 0x00508:
 253         val = s->brk;
 254         break;
 255
 256     /* UART Registers are handled directly by the serial device */
 257
 258     /* GPOUT Register */
 259     case 0x00a00:
 260         val = s->gpout;
 261         break;
 262
 263     /* XXX: implement a real I2C controller */
 264
 265     /* GPINP Register */
 266     case 0x00a08:
 267         /* IN = OUT until a real I2C control is implemented */
 268         if (s->i2csel)
 269             val = s->i2cout;
 270         else
 271             val = 0x00;
 272         break;
 273
 274     /* I2CINP Register */
 275     case 0x00b00:
 276         val = ((s->i2cin & ~1) | eeprom24c0x_read());
 277         break;
 278
 279     /* I2COE Register */
 280     case 0x00b08:
 281         val = s->i2coe;
 282         break;
 283
 284     /* I2COUT Register */
 285     case 0x00b10:
 286         val = s->i2cout;
 287         break;
 288
 289     /* I2CSEL Register */
 290     case 0x00b18:
 291         val = s->i2csel;
 292         break;
 293
 294     default:
 295 #if 0
 296         printf ("malta_fpga_read: Bad register offset 0x" TARGET_FMT_lx "\n",
 297                 addr);
 298 #endif
 299         break;
 300     }
 301     return val;
 302 }
 303
 304 static void malta_fpga_writel(void *opaque, target_phys_addr_t addr,
 305                               uint32_t val)
 306 {
 307     MaltaFPGAState *s = opaque;
 308     uint32_t saddr;
 309
 310     saddr = (addr & 0xfffff);
 311
 312     switch (saddr) {
 313
 314     /* SWITCH Register */
 315     case 0x00200:
 316         break;
 317
 318     /* JMPRS Register */
 319     case 0x00210:
 320         break;
 321
 322     /* LEDBAR Register */
 323     /* XXX: implement a 8-LED array */
 324     case 0x00408:
 325         s->leds = val & 0xff;
 326         break;
 327
 328     /* ASCIIWORD Register */
 329     case 0x00410:
 330         snprintf(s->display_text, 9, "%08X", val);
 331         malta_fpga_update_display(s);
 332         break;
 333
 334     /* ASCIIPOS0 to ASCIIPOS7 Registers */
 335     case 0x00418:
 336     case 0x00420:
 337     case 0x00428:
 338     case 0x00430:
 339     case 0x00438:
 340     case 0x00440:
 341     case 0x00448:
 342     case 0x00450:
 343         s->display_text[(saddr - 0x00418) >> 3] = (char) val;
 344         malta_fpga_update_display(s);
 345         break;
 346
 347     /* SOFTRES Register */
 348     case 0x00500:
 349         if (val == 0x42)
 350             qemu_system_reset_request ();
 351         break;
 352
 353     /* BRKRES Register */
 354     case 0x00508:
 355         s->brk = val & 0xff;
 356         break;
 357
 358     /* UART Registers are handled directly by the serial device */
 359
 360     /* GPOUT Register */
 361     case 0x00a00:
 362         s->gpout = val & 0xff;
 363         break;
 364
 365     /* I2COE Register */
 366     case 0x00b08:
 367         s->i2coe = val & 0x03;
 368         break;
 369
 370     /* I2COUT Register */
 371     case 0x00b10:
 372         eeprom24c0x_write(val & 0x02, val & 0x01);
 373         s->i2cout = val;
 374         break;
 375
 376     /* I2CSEL Register */
 377     case 0x00b18:
 378         s->i2csel = val & 0x01;
 379         break;
 380
 381     default:
 382 #if 0
 383         printf ("malta_fpga_write: Bad register offset 0x" TARGET_FMT_lx "\n",
 384                 addr);
 385 #endif
 386         break;
 387     }
 388 }
 389
 390 static CPUReadMemoryFunc *malta_fpga_read[] = {
 391    malta_fpga_readl,
 392    malta_fpga_readl,
 393    malta_fpga_readl
 394 };
 395
 396 static CPUWriteMemoryFunc *malta_fpga_write[] = {
 397    malta_fpga_writel,
 398    malta_fpga_writel,
 399    malta_fpga_writel
 400 };
 401
 402 static void malta_fpga_reset(void *opaque)
 403 {
 404     MaltaFPGAState *s = opaque;
 405
 406     s->leds   = 0x00;
 407     s->brk    = 0x0a;
 408     s->gpout  = 0x00;
 409     s->i2cin  = 0x3;
 410     s->i2coe  = 0x0;
 411     s->i2cout = 0x3;
 412     s->i2csel = 0x1;
 413
 414     s->display_text[8] = '\0';
 415     snprintf(s->display_text, 9, "        ");
 416 }
 417
 418 static void malta_fpga_led_init(CharDriverState *chr)
 419 {
 420     qemu_chr_printf(chr, "\e[HMalta LEDBAR\r\n");
 421     qemu_chr_printf(chr, "+--------+\r\n");
 422     qemu_chr_printf(chr, "+        +\r\n");
 423     qemu_chr_printf(chr, "+--------+\r\n");
 424     qemu_chr_printf(chr, "\n");
 425     qemu_chr_printf(chr, "Malta ASCII\r\n");
 426     qemu_chr_printf(chr, "+--------+\r\n");
 427     qemu_chr_printf(chr, "+        +\r\n");
 428     qemu_chr_printf(chr, "+--------+\r\n");
 429 }
 430
 431 static MaltaFPGAState *malta_fpga_init(target_phys_addr_t base, qemu_irq uart_irq, CharDriverState *uart_chr)
 432 {
 433     MaltaFPGAState *s;
 434     int malta;
 435
 436     s = (MaltaFPGAState *)qemu_mallocz(sizeof(MaltaFPGAState));
 437
 438     malta = cpu_register_io_memory(0, malta_fpga_read,
 439                                    malta_fpga_write, s);
 440
 441     cpu_register_physical_memory(base, 0x900, malta);
 442     /* 0xa00 is less than a page, so will still get the right offsets.  */
 443     cpu_register_physical_memory(base + 0xa00, 0x100000 - 0xa00, malta);
 444
 445     s->display = qemu_chr_open("fpga", "vc:320x200", malta_fpga_led_init);
 446
 447     s->uart = serial_mm_init(base + 0x900, 3, uart_irq, 230400, uart_chr, 1);
 448
 449     malta_fpga_reset(s);
 450     qemu_register_reset(malta_fpga_reset, 0, s);
 451
 452     return s;
 453 }
 454
 455 /* Audio support */
 456 #ifdef HAS_AUDIO
 457 static void audio_init (PCIBus *pci_bus)
 458 {
 459     struct soundhw *c;
 460     int audio_enabled = 0;
 461
 462     for (c = soundhw; !audio_enabled && c->name; ++c) {
 463         audio_enabled = c->enabled;
 464     }
 465
 466     if (audio_enabled) {
 467         for (c = soundhw; c->name; ++c) {
 468             if (c->enabled) {
 469                 c->init.init_pci(pci_bus);
 470             }
 471         }
 472     }
 473 }
 474 #endif
 475
 476 /* Network support */
 477 static void network_init (PCIBus *pci_bus)
 478 {
 479     int i;
 480
 481     for(i = 0; i < nb_nics; i++) {
 482         NICInfo *nd = &nd_table[i];
 483         int devfn = -1;
 484
 485         if (i == 0 && (!nd->model || strcmp(nd->model, "pcnet") == 0))
 486             /* The malta board has a PCNet card using PCI SLOT 11 */
 487             devfn = 88;
 488
 489         pci_nic_init(pci_bus, nd, devfn, "pcnet");
 490     }
 491 }
 492
 493 /* ROM and pseudo bootloader
 494
 495    The following code implements a very very simple bootloader. It first
 496    loads the registers a0 to a3 to the values expected by the OS, and
 497    then jump at the kernel address.
 498
 499    The bootloader should pass the locations of the kernel arguments and
 500    environment variables tables. Those tables contain the 32-bit address
 501    of NULL terminated strings. The environment variables table should be
 502    terminated by a NULL address.
 503
 504    For a simpler implementation, the number of kernel arguments is fixed
 505    to two (the name of the kernel and the command line), and the two
 506    tables are actually the same one.
 507
 508    The registers a0 to a3 should contain the following values:
 509      a0 - number of kernel arguments
 510      a1 - 32-bit address of the kernel arguments table
 511      a2 - 32-bit address of the environment variables table
 512      a3 - RAM size in bytes
 513 */
 514
 515 static void write_bootloader (CPUState *env, uint8_t *base,
 516                               int64_t kernel_entry)
 517 {
 518     uint32_t *p;
 519
 520     /* Small bootloader */
 521     p = (uint32_t *)base;
 522     stl_raw(p++, 0x0bf00160);                                      /* j 0x1fc00580 */
 523     stl_raw(p++, 0x00000000);                                      /* nop */
 524
 525     /* YAMON service vector */
 526     stl_raw(base + 0x500, 0xbfc00580);      /* start: */
 527     stl_raw(base + 0x504, 0xbfc0083c);      /* print_count: */
 528     stl_raw(base + 0x520, 0xbfc00580);      /* start: */
 529     stl_raw(base + 0x52c, 0xbfc00800);      /* flush_cache: */
 530     stl_raw(base + 0x534, 0xbfc00808);      /* print: */
 531     stl_raw(base + 0x538, 0xbfc00800);      /* reg_cpu_isr: */
 532     stl_raw(base + 0x53c, 0xbfc00800);      /* unred_cpu_isr: */
 533     stl_raw(base + 0x540, 0xbfc00800);      /* reg_ic_isr: */
 534     stl_raw(base + 0x544, 0xbfc00800);      /* unred_ic_isr: */
 535     stl_raw(base + 0x548, 0xbfc00800);      /* reg_esr: */
 536     stl_raw(base + 0x54c, 0xbfc00800);      /* unreg_esr: */
 537     stl_raw(base + 0x550, 0xbfc00800);      /* getchar: */
 538     stl_raw(base + 0x554, 0xbfc00800);      /* syscon_read: */
 539
 540
 541     /* Second part of the bootloader */
 542     p = (uint32_t *) (base + 0x580);
 543     stl_raw(p++, 0x24040002);                                      /* addiu a0, zero, 2 */
 544     stl_raw(p++, 0x3c1d0000 | (((ENVP_ADDR - 64) >> 16) & 0xffff)); /* lui sp, high(ENVP_ADDR) */
 545     stl_raw(p++, 0x37bd0000 | ((ENVP_ADDR - 64) & 0xffff));        /* ori sp, sp, low(ENVP_ADDR) */
 546     stl_raw(p++, 0x3c050000 | ((ENVP_ADDR >> 16) & 0xffff));       /* lui a1, high(ENVP_ADDR) */
 547     stl_raw(p++, 0x34a50000 | (ENVP_ADDR & 0xffff));               /* ori a1, a1, low(ENVP_ADDR) */
 548     stl_raw(p++, 0x3c060000 | (((ENVP_ADDR + 8) >> 16) & 0xffff)); /* lui a2, high(ENVP_ADDR + 8) */
 549     stl_raw(p++, 0x34c60000 | ((ENVP_ADDR + 8) & 0xffff));         /* ori a2, a2, low(ENVP_ADDR + 8) */
 550     stl_raw(p++, 0x3c070000 | (loaderparams.ram_size >> 16));     /* lui a3, high(ram_size) */
 551     stl_raw(p++, 0x34e70000 | (loaderparams.ram_size & 0xffff));  /* ori a3, a3, low(ram_size) */
 552
 553     /* Load BAR registers as done by YAMON */
 554     stl_raw(p++, 0x3c09b400);                                      /* lui t1, 0xb400 */
 555
 556 #ifdef TARGET_WORDS_BIGENDIAN
 557     stl_raw(p++, 0x3c08df00);                                      /* lui t0, 0xdf00 */
 558 #else
 559     stl_raw(p++, 0x340800df);                                      /* ori t0, r0, 0x00df */
 560 #endif
 561     stl_raw(p++, 0xad280068);                                      /* sw t0, 0x0068(t1) */
 562
 563     stl_raw(p++, 0x3c09bbe0);                                      /* lui t1, 0xbbe0 */
 564
 565 #ifdef TARGET_WORDS_BIGENDIAN
 566     stl_raw(p++, 0x3c08c000);                                      /* lui t0, 0xc000 */
 567 #else
 568     stl_raw(p++, 0x340800c0);                                      /* ori t0, r0, 0x00c0 */
 569 #endif
 570     stl_raw(p++, 0xad280048);                                      /* sw t0, 0x0048(t1) */
 571 #ifdef TARGET_WORDS_BIGENDIAN
 572     stl_raw(p++, 0x3c084000);                                      /* lui t0, 0x4000 */
 573 #else
 574     stl_raw(p++, 0x34080040);                                      /* ori t0, r0, 0x0040 */
 575 #endif
 576     stl_raw(p++, 0xad280050);                                      /* sw t0, 0x0050(t1) */
 577
 578 #ifdef TARGET_WORDS_BIGENDIAN
 579     stl_raw(p++, 0x3c088000);                                      /* lui t0, 0x8000 */
 580 #else
 581     stl_raw(p++, 0x34080080);                                      /* ori t0, r0, 0x0080 */
 582 #endif
 583     stl_raw(p++, 0xad280058);                                      /* sw t0, 0x0058(t1) */
 584 #ifdef TARGET_WORDS_BIGENDIAN
 585     stl_raw(p++, 0x3c083f00);                                      /* lui t0, 0x3f00 */
 586 #else
 587     stl_raw(p++, 0x3408003f);                                      /* ori t0, r0, 0x003f */
 588 #endif
 589     stl_raw(p++, 0xad280060);                                      /* sw t0, 0x0060(t1) */
 590
 591 #ifdef TARGET_WORDS_BIGENDIAN
 592     stl_raw(p++, 0x3c08c100);                                      /* lui t0, 0xc100 */
 593 #else
 594     stl_raw(p++, 0x340800c1);                                      /* ori t0, r0, 0x00c1 */
 595 #endif
 596     stl_raw(p++, 0xad280080);                                      /* sw t0, 0x0080(t1) */
 597 #ifdef TARGET_WORDS_BIGENDIAN
 598     stl_raw(p++, 0x3c085e00);                                      /* lui t0, 0x5e00 */
 599 #else
 600     stl_raw(p++, 0x3408005e);                                      /* ori t0, r0, 0x005e */
 601 #endif
 602     stl_raw(p++, 0xad280088);                                      /* sw t0, 0x0088(t1) */
 603
 604     /* Jump to kernel code */
 605     stl_raw(p++, 0x3c1f0000 | ((kernel_entry >> 16) & 0xffff));    /* lui ra, high(kernel_entry) */
 606     stl_raw(p++, 0x37ff0000 | (kernel_entry & 0xffff));            /* ori ra, ra, low(kernel_entry) */
 607     stl_raw(p++, 0x03e00008);                                      /* jr ra */
 608     stl_raw(p++, 0x00000000);                                      /* nop */
 609
 610     /* YAMON subroutines */
 611     p = (uint32_t *) (base + 0x800);
 612     stl_raw(p++, 0x03e00008);                                     /* jr ra */
 613     stl_raw(p++, 0x24020000);                                     /* li v0,0 */
 614    /* 808 YAMON print */
 615     stl_raw(p++, 0x03e06821);                                     /* move t5,ra */
 616     stl_raw(p++, 0x00805821);                                     /* move t3,a0 */
 617     stl_raw(p++, 0x00a05021);                                     /* move t2,a1 */
 618     stl_raw(p++, 0x91440000);                                     /* lbu a0,0(t2) */
 619     stl_raw(p++, 0x254a0001);                                     /* addiu t2,t2,1 */
 620     stl_raw(p++, 0x10800005);                                     /* beqz a0,834 */
 621     stl_raw(p++, 0x00000000);                                     /* nop */
 622     stl_raw(p++, 0x0ff0021c);                                     /* jal 870 */
 623     stl_raw(p++, 0x00000000);                                     /* nop */
 624     stl_raw(p++, 0x08000205);                                     /* j 814 */
 625     stl_raw(p++, 0x00000000);                                     /* nop */
 626     stl_raw(p++, 0x01a00008);                                     /* jr t5 */
 627     stl_raw(p++, 0x01602021);                                     /* move a0,t3 */
 628     /* 0x83c YAMON print_count */
 629     stl_raw(p++, 0x03e06821);                                     /* move t5,ra */
 630     stl_raw(p++, 0x00805821);                                     /* move t3,a0 */
 631     stl_raw(p++, 0x00a05021);                                     /* move t2,a1 */
 632     stl_raw(p++, 0x00c06021);                                     /* move t4,a2 */
 633     stl_raw(p++, 0x91440000);                                     /* lbu a0,0(t2) */
 634     stl_raw(p++, 0x0ff0021c);                                     /* jal 870 */
 635     stl_raw(p++, 0x00000000);                                     /* nop */
 636     stl_raw(p++, 0x254a0001);                                     /* addiu t2,t2,1 */
 637     stl_raw(p++, 0x258cffff);                                     /* addiu t4,t4,-1 */
 638     stl_raw(p++, 0x1580fffa);                                     /* bnez t4,84c */
 639     stl_raw(p++, 0x00000000);                                     /* nop */
 640     stl_raw(p++, 0x01a00008);                                     /* jr t5 */
 641     stl_raw(p++, 0x01602021);                                     /* move a0,t3 */
 642     /* 0x870 */
 643     stl_raw(p++, 0x3c08b800);                                     /* lui t0,0xb400 */
 644     stl_raw(p++, 0x350803f8);                                     /* ori t0,t0,0x3f8 */
 645     stl_raw(p++, 0x91090005);                                     /* lbu t1,5(t0) */
 646     stl_raw(p++, 0x00000000);                                     /* nop */
 647     stl_raw(p++, 0x31290040);                                     /* andi t1,t1,0x40 */
 648     stl_raw(p++, 0x1120fffc);                                     /* beqz t1,878 <outch+0x8> */
 649     stl_raw(p++, 0x00000000);                                     /* nop */
 650     stl_raw(p++, 0x03e00008);                                     /* jr ra */
 651     stl_raw(p++, 0xa1040000);                                     /* sb a0,0(t0) */
 652
 653 }
 654
 655 static void prom_set(int index, const char *string, ...)
 656 {
 657     char buf[ENVP_ENTRY_SIZE];
 658     target_phys_addr_t p;
 659     va_list ap;
 660     int32_t table_addr;
 661
 662     if (index >= ENVP_NB_ENTRIES)
 663         return;
 664
 665     p = ENVP_ADDR + VIRT_TO_PHYS_ADDEND + index * 4;
 666
 667     if (string == NULL) {
 668         stl_phys(p, 0);
 669         return;
 670     }
 671
 672     table_addr = ENVP_ADDR + sizeof(int32_t) * ENVP_NB_ENTRIES
 673                  + index * ENVP_ENTRY_SIZE;
 674     stl_phys(p, table_addr);
 675
 676     va_start(ap, string);
 677     vsnprintf(buf, ENVP_ENTRY_SIZE, string, ap);
 678     va_end(ap);
 679     pstrcpy_targphys(table_addr + VIRT_TO_PHYS_ADDEND, ENVP_ENTRY_SIZE, buf);
 680 }
 681
 682 /* Kernel */
 683 static int64_t load_kernel (CPUState *env)
 684 {
 685     int64_t kernel_entry, kernel_low, kernel_high;
 686     int index = 0;
 687     long initrd_size;
 688     ram_addr_t initrd_offset;
 689
 690     if (load_elf(loaderparams.kernel_filename, VIRT_TO_PHYS_ADDEND,
 691                  (uint64_t *)&kernel_entry, (uint64_t *)&kernel_low,
 692                  (uint64_t *)&kernel_high) < 0) {
 693         fprintf(stderr, "qemu: could not load kernel '%s'\n",
 694                 loaderparams.kernel_filename);
 695         exit(1);
 696     }
 697
 698     /* load initrd */
 699     initrd_size = 0;
 700     initrd_offset = 0;
 701     if (loaderparams.initrd_filename) {
 702         initrd_size = get_image_size (loaderparams.initrd_filename);
 703         if (initrd_size > 0) {
 704             initrd_offset = (kernel_high + ~TARGET_PAGE_MASK) & TARGET_PAGE_MASK;
 705             if (initrd_offset + initrd_size > ram_size) {
 706                 fprintf(stderr,
 707                         "qemu: memory too small for initial ram disk '%s'\n",
 708                         loaderparams.initrd_filename);
 709                 exit(1);
 710             }
 711             initrd_size = load_image_targphys(loaderparams.initrd_filename,
 712                                               initrd_offset,
 713                                               ram_size - initrd_offset);
 714         }
 715         if (initrd_size == (target_ulong) -1) {
 716             fprintf(stderr, "qemu: could not load initial ram disk '%s'\n",
 717                     loaderparams.initrd_filename);
 718             exit(1);
 719         }
 720     }
 721
 722     /* Store command line.  */
 723     prom_set(index++, loaderparams.kernel_filename);
 724     if (initrd_size > 0)
 725         prom_set(index++, "rd_start=0x" TARGET_FMT_lx " rd_size=%li %s",
 726                  PHYS_TO_VIRT(initrd_offset), initrd_size,
 727                  loaderparams.kernel_cmdline);
 728     else
 729         prom_set(index++, loaderparams.kernel_cmdline);
 730
 731     /* Setup minimum environment variables */
 732     prom_set(index++, "memsize");
 733     prom_set(index++, "%i", loaderparams.ram_size);
 734     prom_set(index++, "modetty0");
 735     prom_set(index++, "38400n8r");
 736     prom_set(index++, NULL);
 737
 738     return kernel_entry;
 739 }
 740
 741 static void main_cpu_reset(void *opaque)
 742 {
 743     CPUState *env = opaque;
 744     cpu_reset(env);
 745
 746     /* The bootload does not need to be rewritten as it is located in a
 747        read only location. The kernel location and the arguments table
 748        location does not change. */
 749     if (loaderparams.kernel_filename) {
 750         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 751         load_kernel (env);
 752     }
 753 }
 754
 755 static
 756 void mips_malta_init (ram_addr_t ram_size,
 757                       const char *boot_device,
 758                       const char *kernel_filename, const char *kernel_cmdline,
 759                       const char *initrd_filename, const char *cpu_model)
 760 {
 761     char *filename;
 762     ram_addr_t ram_offset;
 763     ram_addr_t bios_offset;
 764     target_long bios_size;
 765     int64_t kernel_entry;
 766     PCIBus *pci_bus;
 767     CPUState *env;
 768     RTCState *rtc_state;
 769     fdctrl_t *floppy_controller;
 770     MaltaFPGAState *malta_fpga;
 771     qemu_irq *i8259;
 772     int piix4_devfn;
 773     uint8_t *eeprom_buf;
 774     i2c_bus *smbus;
 775     int i;
 776     int index;
 777     BlockDriverState *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
 778     BlockDriverState *fd[MAX_FD];
 779     int fl_idx = 0;
 780     int fl_sectors = 0;
 781
 782     /* init CPUs */
 783     if (cpu_model == NULL) {
 784 #ifdef TARGET_MIPS64
 785         cpu_model = "20Kc";
 786 #else
 787         cpu_model = "24Kf";
 788 #endif
 789     }
 790     env = cpu_init(cpu_model);
 791     if (!env) {
 792         fprintf(stderr, "Unable to find CPU definition\n");
 793         exit(1);
 794     }
 795     qemu_register_reset(main_cpu_reset, 0, env);
 796
 797     /* allocate RAM */
 798     if (ram_size > (256 << 20)) {
 799         fprintf(stderr,
 800                 "qemu: Too much memory for this machine: %d MB, maximum 256 MB\n",
 801                 ((unsigned int)ram_size / (1 << 20)));
 802         exit(1);
 803     }
 804     ram_offset = qemu_ram_alloc(ram_size);
 805     bios_offset = qemu_ram_alloc(BIOS_SIZE);
 806
 807
 808     cpu_register_physical_memory(0, ram_size, ram_offset | IO_MEM_RAM);
 809
 810     /* Map the bios at two physical locations, as on the real board. */
 811     cpu_register_physical_memory(0x1e000000LL,
 812                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 813     cpu_register_physical_memory(0x1fc00000LL,
 814                                  BIOS_SIZE, bios_offset | IO_MEM_ROM);
 815
 816     /* FPGA */
 817     malta_fpga = malta_fpga_init(0x1f000000LL, env->irq[2], serial_hds[2]);
 818
 819     /* Load firmware in flash / BIOS unless we boot directly into a kernel. */
 820     if (kernel_filename) {
 821         /* Write a small bootloader to the flash location. */
 822         loaderparams.ram_size = ram_size;
 823         loaderparams.kernel_filename = kernel_filename;
 824         loaderparams.kernel_cmdline = kernel_cmdline;
 825         loaderparams.initrd_filename = initrd_filename;
 826         kernel_entry = load_kernel(env);
 827         env->CP0_Status &= ~((1 << CP0St_BEV) | (1 << CP0St_ERL));
 828         write_bootloader(env, qemu_get_ram_ptr(bios_offset), kernel_entry);
 829     } else {
 830         index = drive_get_index(IF_PFLASH, 0, fl_idx);
 831         if (index != -1) {
 832             /* Load firmware from flash. */
 833             bios_size = 0x400000;
 834             fl_sectors = bios_size >> 16;
 835 #ifdef DEBUG_BOARD_INIT
 836             printf("Register parallel flash %d size " TARGET_FMT_lx " at "
 837                    "offset %08lx addr %08llx '%s' %x\n",
 838                    fl_idx, bios_size, bios_offset, 0x1e000000LL,
 839                    bdrv_get_device_name(drives_table[index].bdrv), fl_sectors);
 840 #endif
 841             pflash_cfi01_register(0x1e000000LL, bios_offset,
 842                                   drives_table[index].bdrv, 65536, fl_sectors,
 843                                   4, 0x0000, 0x0000, 0x0000, 0x0000);
 844             fl_idx++;
 845         } else {
 846             /* Load a BIOS image. */
 847             if (bios_name == NULL)
 848                 bios_name = BIOS_FILENAME;
 849             filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name);
 850             if (filename) {
 851                 bios_size = load_image_targphys(filename, 0x1fc00000LL,
 852                                                 BIOS_SIZE);
 853                 qemu_free(filename);
 854             } else {
 855                 bios_size = -1;
 856             }
 857             if ((bios_size < 0 || bios_size > BIOS_SIZE) && !kernel_filename) {
 858                 fprintf(stderr,
 859                         "qemu: Could not load MIPS bios '%s', and no -kernel argument was specified\n",
 860                         bios_name);
 861                 exit(1);
 862             }
 863         }
 864         /* In little endian mode the 32bit words in the bios are swapped,
 865            a neat trick which allows bi-endian firmware. */
 866 #ifndef TARGET_WORDS_BIGENDIAN
 867         {
 868             uint32_t *addr = qemu_get_ram_ptr(bios_offset);;
 869             uint32_t *end = addr + bios_size;
 870             while (addr < end) {
 871                 bswap32s(addr);
 872             }
 873         }
 874 #endif
 875     }
 876
 877     /* Board ID = 0x420 (Malta Board with CoreLV)
 878        XXX: theoretically 0x1e000010 should map to flash and 0x1fc00010 should
 879        map to the board ID. */
 880     stl_phys(0x1fc00010LL, 0x00000420);
 881
 882     /* Init internal devices */
 883     cpu_mips_irq_init_cpu(env);
 884     cpu_mips_clock_init(env);
 885
 886     /* Interrupt controller */
 887     /* The 8259 is attached to the MIPS CPU INT0 pin, ie interrupt 2 */
 888     i8259 = i8259_init(env->irq[2]);
 889
 890     /* Northbridge */
 891     pci_bus = pci_gt64120_init(i8259);
 892
 893     /* Southbridge */
 894
 895     if (drive_get_max_bus(IF_IDE) >= MAX_IDE_BUS) {
 896         fprintf(stderr, "qemu: too many IDE bus\n");
 897         exit(1);
 898     }
 899
 900     for(i = 0; i < MAX_IDE_BUS * MAX_IDE_DEVS; i++) {
 901         index = drive_get_index(IF_IDE, i / MAX_IDE_DEVS, i % MAX_IDE_DEVS);
 902         if (index != -1)
 903             hd[i] = drives_table[index].bdrv;
 904         else
 905             hd[i] = NULL;
 906     }
 907
 908     piix4_devfn = piix4_init(pci_bus, 80);
 909     pci_piix4_ide_init(pci_bus, hd, piix4_devfn + 1, i8259);
 910     usb_uhci_piix4_init(pci_bus, piix4_devfn + 2);
 911     smbus = piix4_pm_init(pci_bus, piix4_devfn + 3, 0x1100, i8259[9]);
 912     eeprom_buf = qemu_mallocz(8 * 256); /* XXX: make this persistent */
 913     for (i = 0; i < 8; i++) {
 914         /* TODO: Populate SPD eeprom data.  */
 915         DeviceState *eeprom;
 916         eeprom = qdev_create((BusState *)smbus, "smbus-eeprom");
 917         qdev_set_prop_int(eeprom, "address", 0x50 + i);
 918         qdev_set_prop_ptr(eeprom, "data", eeprom_buf + (i * 256));
 919         qdev_init(eeprom);
 920     }
 921     pit = pit_init(0x40, i8259[0]);
 922     DMA_init(0);
 923
 924     /* Super I/O */
 925     i8042_init(i8259[1], i8259[12], 0x60);
 926     rtc_state = rtc_init(0x70, i8259[8], 2000);
 927     serial_init(0x3f8, i8259[4], 115200, serial_hds[0]);
 928     serial_init(0x2f8, i8259[3], 115200, serial_hds[1]);
 929     if (parallel_hds[0])
 930         parallel_init(0x378, i8259[7], parallel_hds[0]);
 931     for(i = 0; i < MAX_FD; i++) {
 932         index = drive_get_index(IF_FLOPPY, 0, i);
 933        if (index != -1)
 934            fd[i] = drives_table[index].bdrv;
 935        else
 936            fd[i] = NULL;
 937     }
 938     floppy_controller = fdctrl_init(i8259[6], 2, 0, 0x3f0, fd);
 939
 940     /* Sound card */
 941 #ifdef HAS_AUDIO
 942     audio_init(pci_bus);
 943 #endif
 944
 945     /* Network card */
 946     network_init(pci_bus);
 947
 948     /* Optional PCI video card */
 949     if (cirrus_vga_enabled) {
 950         pci_cirrus_vga_init(pci_bus);
 951     } else if (vmsvga_enabled) {
 952         pci_vmsvga_init(pci_bus);
 953     } else if (std_vga_enabled) {
 954         pci_vga_init(pci_bus, 0, 0);
 955     }
 956 }
 957
 958 static QEMUMachine mips_malta_machine = {
 959     .name = "malta",
 960     .desc = "MIPS Malta Core LV",
 961     .init = mips_malta_init,
 962     .is_default = 1,
 963 };
 964
 965 static void mips_malta_machine_init(void)
 966 {
 967     qemu_register_machine(&mips_malta_machine);
 968 }
 969
 970 machine_init(mips_malta_machine_init);